lab_freq

Complex Exponentials, Frequency Estimation and Carrier Frequency Offset

Complex exponentials are the most fundamental signals for all frequency domain analysis of linear system. In this lab you will learn to:

• Send a complex exponential or continuous-wave (CW) signal through the SDR
• Estimate the TX and RX frequency from an FFT
• Estimate the carrier frequency offset
• Save data for files for offline processing

In the graduate version of the lab, students will additionally learn:

• Estimate the gain and frequency via an FFT method with oversampling
• Estimate the complex gain and frequency of a sinusoid via a simple correlation method
• Estimate the gain and frequency via gradient descent

Files:

• freqUG.mlx: The undergraduate version of the lab
• freqGrad.mlx: The graduate version of the lab
• The file estFreq.m is a function for computing the estimated frequency.

For the lab, complete the TODO sections in both files, run labFreq.mlx, and print to PDF. Submit the PDF.